Method for data backup, device and system

Abstract

A method for backing up data in a data center, device and system are provided. The data in all the VMs of one data center can be backed up simultaneously, and the associations between the VMs are also backed up during the backup, so it is unnecessary to concern the recovery orders of the VMs when the data of the data center is recovered. Meanwhile, when the stored data is exported from the hypervisor node, it is unnecessary to notify the upper layer OS for a backup, thereby improving the data backup efficiency and reducing the system logical complexity.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of International Patent Application No. PCT / CN2011 / 077945, filed on Aug. 3, 2011, which is hereby incorporated by reference in its entireties.FIELD OF THE INVENTION[0002]The present invention relates to the field of IT, and particularly to a method for data backup of a data center.BACKGROUND OF THE INVENTION[0003]With the development of the communication technology, more and more data centers employ the virtualization technology, which abstracts and then rearranges the computer system hardware, and a virtualization software layer runs between the computer hardware platform and the Operation System (OS). The virtualization software layer is generally called as hypervisor and capable of running multiple OSs on a plurality of computer hardware platforms.[0004]A data center employing the virtualization technology no longer runs a single operation system, thus the backup and deployment for the data center gra...

AI Technical Summary

Benefits of technology

The present invention provides a method for virtualized data migration or backup, and a method, device, and system for virtualized data rearrangement, to uniformly backup data in all VMs (virtual machines) of a data center. This improves backup efficiency and reduces system logical complexity. The data in all VMs can be backed up simultaneously, and the associations between VMs are also backed up during the backup. When the stored data is exported from the hypervisor node, it is unnecessary to notify the upper layer OS for a backup.

Problems solved by technology

But the backups are just limited to respective VMs, while the associations between the VMs cannot be backed up.

During the research and practice of the prior art, the inventor finds that in the current implementation, when the VMs of the data center are directly associated with each other, and their running states depend on one another, it is complicated to back up each separate system (corresponding to one VM) of the data center and then perform a separate recovery, and a mis-operation may be easily caused, thus the backed up data center is not fully consistent with the original data center system.

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